Solar subsidy calculator for Bihar
Enter your monthly NBPDCL / SBPDCL bill to estimate system size, subsidy, and payback period.
Where your money goes
Your 25-year money curve
What the planet gets
Based on India's grid emission factor (~0.82 kg CO₂/unit) and ~20 kg CO₂ absorbed per mature tree per year.
NBPDCL (north) and SBPDCL (south) handle net metering. Bihar's high effective tariffs make rooftop solar payback attractive where roof space allows.
Enter a valid monthly bill greater than ₹0 to see your results.
How Bihar compares to the India average
Your tariff and any state top-up decide most of the difference between states.
Avg electricity tariff
₹7.5/unit
₹7/unit India avg
Higher tariffs make every solar unit worth more
Total subsidy on 3kW
₹78,000
₹78,000 central baseline
No confirmed unconditional state top-up
Typical payback (3kW)
~3.1 years
~3.4 years India avg
Faster than the national average at benchmark costs
What a 3kW system costs in Bihar
3kW is the most common residential size, it maxes out the central subsidy. At the ₹60,000/kW benchmark:
- Gross cost (3kW)
- ₹1,80,000
- Central subsidy
- − ₹78,000
- Your net cost
- ₹1,02,000
A 3kW system generates roughly 360 units/month at the national 4 units/kW/day average, check the calculator above with your actual bill for a size matched to your usage.
Every system size in Bihar
Computed with Bihar's ₹7.5/unit tariff, at the ₹60,000/kW benchmark.
| Size | Gross cost | Total subsidy | Net cost | Units/month | Payback |
|---|---|---|---|---|---|
| 1kW | ₹60,000 | − ₹30,000 | ₹30,000 | ~120 | ~2.8 yrs |
| 2kW | ₹1,20,000 | − ₹60,000 | ₹60,000 | ~240 | ~2.8 yrs |
| 3kW | ₹1,80,000 | − ₹78,000 | ₹1,02,000 | ~360 | ~3.1 yrs |
| 5kW | ₹3,00,000 | − ₹78,000 | ₹2,22,000 | ~600 | ~4.1 yrs |
| 10kW | ₹6,00,000 | − ₹78,000 | ₹5,22,000 | ~1200 | ~4.8 yrs |
Payback assumes the system offsets your bill at ₹7.5/unit. Real quotes vary ₹45,000-₹75,000/kW by brand and roof structure.
How to apply in Bihar
The process is national, everything runs through pmsuryaghar.gov.in with NBPDCL / SBPDCL handling feasibility, the net meter, and inspection.
- 1
Register on the PM Surya Ghar portal
Same day - 2
Apply for rooftop solar
Feasibility approval typically within 15 days - 3
Choose a registered vendor
Your pace, don't rush vendor selection - 4
Installation
1-3 weeks from order, 2-3 days on the roof - 5
Submit installation details & apply for net meter
Net meter typically installed within 15-30 days - 6
Inspection & commissioning certificate
Usually within 15 days of net meter installation - 7
Submit bank details & receive subsidy
Subsidy credited within ~30 days of commissioning
Bihar solar subsidy FAQs
How much solar subsidy do I get in Bihar?
Every household in Bihar gets the central PM Surya Ghar subsidy: ₹30,000 for 1kW, ₹60,000 for 2kW, and ₹78,000 for 3kW or larger. Bihar currently has no confirmed unconditional state top-up, so the central subsidy is what you get.
What does a 3kW solar system cost in Bihar after subsidy?
At a benchmark gross cost of ₹1,80,000 (₹60,000/kW), a 3kW system in Bihar costs about ₹1,02,000 after ₹78,000 of subsidy. Real quotes vary ₹45,000-₹75,000 per kW by brand and roof structure.
How long does the solar application take in Bihar?
Expect roughly 30-60 days end to end in Bihar, from portal registration through feasibility approval, installation, net meter fitting by NBPDCL / SBPDCL, inspection, and subsidy credit to your bank account.
Who handles net metering in Bihar?
NBPDCL / SBPDCL. NBPDCL (north) and SBPDCL (south) handle net metering. Bihar's high effective tariffs make rooftop solar payback attractive where roof space allows.
Where do I apply for the solar subsidy in Bihar?
All applications go through the national PM Surya Ghar portal (pmsuryaghar.gov.in), there is no separate state application for the central subsidy. You select Bihar and your DISCOM (NBPDCL / SBPDCL) during registration.
City-level calculators in Bihar
Sunshine varies city to city, these pages tune the generation estimate to local peak sun hours.